Question about 2002 GMC Envoy

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I have loud nocking in my 2002 envoy why is that

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  • Jeremy W.
    Jeremy W. Feb 18, 2012

    can you describe when the noise happens.

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Knocking can usually be traced to a lack of lubrication, old engine oil, or a batch of bad gasoline. If you can determine where the knocking is coming from, it would be easier to narrow it down. If the knocking is coming from the dome cover area, you may have a leak around the dome cover gasket, preventing oil from properly lubricating the rocker arms.

Posted on Feb 18, 2012

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I am a woman learning to fix my 2002 GMC Envoy and it is knocking and the oil disappeared. I had an oil change about 2 months ago.


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